Sealing-cap for vessels.



No. 686,623. Patented Nov. 12, 190i. A. A. LOW.

SEQALING GAP FOR YE'SSELS. (Application ma May 29, 1900. (No Modal.)

TN! Norms PETERS 00., menu Two; WASHINGTON, D. c.

UNITED STATES PATENT OFFICE.

ABBOT AUGUSTUS LOW, OF BROOKLYN, NEW YORK.

SEALING-CAP F oR VESSELS.

SPECIFICATION forming part of Letters Patent No. 686,623, dated November12, 1901.

Application filed May 29, 1900.

T0 at whom it may concern:

Be it known that I, ABBoT AUeUs'rUs Low, a citizen of the United States,and a resident of Brooklyn, in the county of Kings and State of NewYork, have invented a certain new and useful Sealing-Cap for Vessels, ofwhich the following is a specification.

My invention relates to caps for'sealing vessels, and its object is toprovide a means for sealing hermetically free from the inefficiencies offormer means; and to this end it con-. sists in certain elements andcombinations fully specified and claimed herein.

In order that persons skilled in the art may understand, construct, anduse my invention, I will proceed to describe it, referring to thedrawings herewith, in Which- Figure 1 is a vertical central section ofone form of my invention, showing the cap in a partially-closed positionand the edges of the inner shell depending below the upper edges of thevessel-mouth to guide and center the said inner shell and its packingover the mouth of the vessel; and Fig. 2 is a plan view broken away toshow the interior shell which controls and contains the packingmaterial. Fig. 3 is another form of the same, as to the said interiorshell, showing the cap in a closed position and the packing in the innershell compressed upon the top of the walls of the vessel-neck and inbetween the depending walls of the inner shell, and consequently causingthe packing in said inner shell to be closely confined over the topedges of the walls of the vessel-neck.

A is the vessel-neck, and B the walls of same, provided in this instancewith screwthread.

C is the barrel of the cap, provided with screw-thread to match andengage with the threadupon the walls B in a well-known manner.

D is the top of the cap, flanged centrally from the top edges of barrel0, and may be a disk extending wholly or a flange extending partiallyover the top of the vessel.

E is a cup-shaped inner shell, as in Fig. 1.

F isa packing contained in shell E, filling the cup of same, as inFig. 1. The width of the packing in the shell in Fig; 3 is intended tobe wider than the width of the top of the walls of the vessel, so thatwhen forced down Serial No. 18,374.. (No model.)

hard upon said walls the packing will embrace t e edgesof the saidwalls. In Fig. 1 the cup-shaped shell is preferably broader somewhatthan the diameter of the vessel-neck outside thewalls of the same, andthe packing containedin said shell when forced down upon the said wallsembraces the outer edge of the top of said-walls, and in both cases thepacking within the shell is held firmly in well-defined bounds, so thatwhen embracing the edges of the top of the walls B the pack ing is heldfirmly and cannotspread or break away, as it usually does in otherprevious devices, but hugs the said edges tightly, and thus secures anabsolutely-hermetical sealing and a result long sought for.

Inasmuch as the top D of the cap is independent of the inner shell theone slides over the other without disturbing the packing after it hasseated itself over the walls of the vessel. This is an important pointin addition to the fact that the packing overlaps the top of the saidwalls and embraces the edge thereof.

The thread of the barrel 0 does not reach the top of the barrel; but aplain portion underneath lies between the top of the thread and the topof the barrel, where it joins the top D, and the inner shell setsclosely in the plain portion, so that no injurious result is produced byscrewing on the cap. A vertical movement of the inner shell is the onlyone effected.

I am aware of the English patent to Bylands, No. 868 of 1887, and UnitedStates patent to Bouneu, No. 574,37 9, dated J anuary-5, 1897, and donot claim anything set out in either of said references.

Having now fully described my invention and the manner in which I haveembodied it, what I claim as new and as my invention, and desire tosecure by Letters Patent, is-

1. In a sealing-cap for vessels, the combination consisting of thebarrel of the cap; means for securing it upon and releasing it from thevessel, flange turned centrally from the upper art of the barrel to formthe top of the cap; a recessed packing-shell constructed to contain andcontaining packing material within said recess, said shell beingconstructed to conform to the outer circumference of the top of the saidbarrel, and cap and to be entirely controlled thereby, as to thevertical movements of the said inner shell, and guided in its horizontalmovements by the outer surface of the neck of the vessel, through or bymeans of, the depending vertical sides of the inner shell but unattachedthereto, all constructed, arranged and combined when applied to avessel, to compress and closely confine the said packing directly overthe edges of the top of the walls of the vessel, and between thedepending sides of the said inner shell and the outer surfaces of thevesselneck and to permit the cap to move over the inner packing-shell,without in any way disturbing the sealing means, all constructed,arranged and combined to operate substantially as and for the purposeshereinbefore specified.

2. In adevice for sealing vessels; the combination consisting of anouter cup-shaped cap, provided with means for attaching it to andremoving it from a vessel-neck an inner shell provided with packingmaterial and constructed to closely fit the inner surfaces of the upperpart of the outer cap, but unattached thereto, the rim of said innershell being constructed and arranged, when applied to a vessel toembrace the outer circumference of the walls of the vessel-neck and tocenter said shell thereon, and when the outer cap is forced down uponit, to compress the packing over the top and edges of said walls andbetween the rim of the said inner shell and the outer circumference ofthe said walls of the neck substantially as specified.

Signed at New York, in the county of New York and State of New York,this 10th day of May, A. D. 1900.

ABBO'I AUGUSTUS LOW. Witnesses:

JAMES W. EATON, SIDNEY S. PAINTER.

